CN113477166B - Device and process for replacing reduction gearbox of slurry stirrer without stopping - Google Patents
Device and process for replacing reduction gearbox of slurry stirrer without stopping Download PDFInfo
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- CN113477166B CN113477166B CN202110743315.5A CN202110743315A CN113477166B CN 113477166 B CN113477166 B CN 113477166B CN 202110743315 A CN202110743315 A CN 202110743315A CN 113477166 B CN113477166 B CN 113477166B
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Abstract
The invention relates to the technical field of slurry stirring, in particular to a device and a process for replacing a reduction gearbox of a slurry stirrer without stopping a vehicle.
Description
Technical Field
The invention relates to the technical field of slurry stirring, in particular to a device and a process for replacing a reduction gearbox of a slurry stirrer without stopping.
Background
In the process flow of the Cortis polyester device, a slurry system is the head link of a main material flow, a slurry preparation tank continuously operates through a stirrer, and liquid ethylene glycol (EG for short, hereinafter replaced for short) continuously entering a tank body and powdery pure terephthalic acid (PTA for short, hereinafter replaced for short) are quickly mixed to form relatively uniform slurry-paste mixture, namely slurry. The slurry system provides continuous and stable slurry, which is the premise that the whole device can run stably.
The slurry preparation tank needs to rapidly disperse the falling PTA into a slurry system due to the process characteristics, which determines the high-speed and high-shear characteristics of the stirrer, so that the reduction gearbox bears the stress of high speed and high torque. When the reduction gearbox of the stirrer has mechanical failure, the mixing operation of EG and PTA is immediately interrupted due to safety interlock, and the generation of new slurry is stopped immediately. Because the slurry is heterogeneous turbid liquid, sedimentation layering can occur after standing for a moment, once the slurry is completely settled, the slurry can not be recovered by stirring again, only can be manually cleaned, and the device is forced to stop, so that the consequences are serious.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a device and a process for replacing a reduction gearbox of a slurry stirrer without stopping, wherein the device and the process are used for configuring low-load slurry and preventing the slurry from settling when no stirring is performed.
The technical scheme of the invention is realized as follows: including the thick liquids jar from taking the agitator, the external thick liquids delivery pump from taking backflow pipeline of thick liquids jar, the inside diapire central point of thick liquids jar puts and is equipped with nitrogen gas bubbling point, be equipped with first ethylene glycol nozzle combination on the inside quarter position inner wall of thick liquids jar, be equipped with second ethylene glycol nozzle combination on the inside lower quarter position inner wall of thick liquids jar, be equipped with eight vortex baffles about thick liquids jar axial annular array and fixed on the inside lateral wall of thick liquids jar.
The invention is further configured to: the power end of the stirrer in the slurry tank is connected with a reduction gearbox, and the reduction gearbox is powered by a motor.
The nitrogen bubbling point is formed by a nozzle which is fixedly arranged at the center of the bottom inside the slurry tank and controlled by a plunger valve, and the plunger valve of the nitrogen bubbling point is connected with a nitrogen pipeline.
The second ethylene glycol nozzle combination and the first ethylene glycol nozzle combination are respectively composed of four nozzles which are uniformly arrayed in the axis direction of the slurry tank and fixedly arranged on the inner wall of the corresponding position of the slurry tank, and the nozzles of the second ethylene glycol nozzle combination and the first ethylene glycol nozzle combination are controlled by plunger valves connected with EG pipelines.
The four nozzles at the corresponding positions of the second ethylene glycol nozzle combination and the first ethylene glycol nozzle combination are in clockwise inclined upward spraying directions, and the nozzle direction of the nitrogen bubbling point is in vertical upward spraying directions.
The agitator includes the (mixing) shaft of being connected with reducing gear box power, the torsional spring rotates on the (mixing) shaft and is equipped with the dislocation board, be equipped with the dislocation chamber in the dislocation board, the fixed disk that is located the dislocation intracavity is fixed to be equipped with on the (mixing) shaft, be equipped with four articulated chambeies that link up with the outside about (mixing) shaft ring array on the dislocation board, articulated intracavity is in the same direction as, fixedly between the anticlockwise both sides inner wall is equipped with the fixed pin, the torsional spring rotates on the fixed pin and is equipped with the line wheel, the torsional spring elasticity between line wheel and the fixed pin is less than the torsional spring elasticity between (mixing) shaft and the dislocation board far away, fixedly on the anticlockwise side end face of line wheel be equipped with and correspond the blade that the position fixed pin rotates to be connected, the winding is equipped with the expansion rope on the line wheel, four the expansion rope extends to dislocation intracavity respectively and corresponds position excircle terminal surface fixed disk fixed connection.
The outer circle end face of the fixed disc is provided with four centrifugal holes with openings facing away from one side of the stirring shaft in corresponding positions of the four unfolding ropes, centrifugal balls are arranged in the centrifugal holes in a sliding mode, one side end face of each centrifugal ball is close to the stirring shaft, centrifugal springs are fixedly arranged between the inner walls of the sides, close to the stirring shaft, of the centrifugal holes, the other end of each centrifugal ball is fixedly provided with an auxiliary rope close to one side end face of the stirring shaft, and the other end of each auxiliary rope extends into the staggered cavity and is fixedly connected with the corresponding unfolding rope.
The invention further discloses a process for replacing a reduction gearbox of a slurry stirrer without stopping, which comprises the following steps:
stopping PTA blanking immediately after a stirrer fails and quickly opening a nitrogen bubbling point at the bottom in a slurry tank to convey nitrogen into the slurry tank;
secondly, reducing the amount of the slurry which is sent to the feeding tank by the slurry conveying pump and adjusting the amount of the slurry which flows back to the slurry tank to the maximum limit at the same time of the step one;
thirdly, switching the slurry preparation EG to a second ethylene glycol nozzle combination and a first ethylene glycol nozzle combination to form a rolling slurry flow inside the slurry tank;
fourthly, gradually recovering the blanking of the PTA, and carrying out low-load slurry configuration work;
fifthly, maintaining and replacing the reduction gearbox and the motor of the stirrer.
When the stirrer in the slurry tank normally works, the plunger valves of the nitrogen bubbling point, the second ethylene glycol nozzle combination and the first ethylene glycol nozzle combination are all in a closed state.
When low-load slurry configuration is carried out, real-time concentration detection is carried out on output slurry, and the blanking speed of PTA is adjusted in real time.
Through adopting above-mentioned technical scheme, need overhaul reducing gear box and motor or when changing at the thick liquids agitator break down, utilize the nitrogen gas blast point that is located the tank bottoms to carry out supplementary stirring to thick liquids in the jar, the transport that utilizes the supplementary EG nozzle combination that is located jar upper and lower two parts to carry out the EG simultaneously, thereby make the thick liquids in the jar roll, improve by a wide margin under the stirring-free condition, the anti settlement ability of thick liquids, make thick liquids prepare the ability that the jar obtained the low-load thick liquids and prepared simultaneously, the ability of the anti risk of polyester device has been improved greatly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a process system for replacing a reduction gearbox of a slurry stirrer without stopping;
FIG. 2 is a schematic view of the internal structure of the "slurry preparation tank 4";
FIG. 3 is a schematic view showing a specific arrangement direction of "EG nozzle combination";
FIG. 4 is a schematic structural view of the "stirrer 8";
fig. 5 is a schematic view of a transverse cross-sectional structure of the "dislocation plate 83";
FIG. 6 is a schematic view of the "blade 82" in its deployed configuration;
FIG. 7 is an enlarged schematic view of the centrifugal hole 90;
FIG. 8 is a schematic view of the process flow for replacing the reduction gearbox of the slurry stirrer without stopping the vehicle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in figures 1 to 7, the invention discloses a device for replacing a reduction gearbox of a slurry stirrer without stopping a vehicle, which comprises a slurry configuration tank 4 with a stirrer 8, wherein the slurry configuration tank 4 is externally connected with a slurry delivery pump 9 with a backflow pipeline, the slurry delivery pump 9 is used for realizing the output and backflow of slurry, a nitrogen bubbling point 1 is arranged at the center of the bottom wall inside the slurry configuration tank 4, the nitrogen bubbling point 1 can be used for realizing the auxiliary stirring of the slurry inside the slurry configuration tank 4, a first ethylene glycol nozzle combination 3 is arranged on the inner wall of the upper quarter position inside the slurry configuration tank 4, a second ethylene glycol nozzle combination 2 is arranged on the inner wall of the lower quarter position inside the slurry configuration tank 4, eight turbulence baffles 5 are fixedly arranged on the inner side wall inside the slurry configuration tank 4 in an axial annular array manner relative to the slurry configuration tank 4, and the second ethylene glycol nozzle combination 2, The first ethylene glycol nozzle assembly 3 is used as a standby conveying channel for EG, and through the combined action of the second ethylene glycol nozzle assembly 2, the first ethylene glycol nozzle assembly 3 and the turbulence baffle 5, the slurry in the slurry configuration tank 4 can be tumbled.
Referring to the attached figure 1, the power end of a stirrer 8 in the slurry configuration tank 4 is connected with a reduction gearbox 7, the reduction gearbox 7 is powered by a motor 6, and the stirrer 8 can generate larger torque through the reduction of the reduction gearbox 7.
Referring to fig. 1, 2 and 3, the nitrogen bubbling point 1 is formed by a nozzle fixedly arranged at the center of the bottom inside the slurry preparation tank 4 and controlled by a plunger valve, the plunger valve of the nitrogen bubbling point 1 is connected with a nitrogen pipeline, nitrogen is conveyed into the slurry preparation tank 4 through the nitrogen bubbling point 1, and the slurry in the slurry preparation tank 4 can be stirred by using nitrogen bubbles, so that the settling time of the slurry is prolonged.
Referring to fig. 1, 2, and 3, the second ethylene glycol nozzle assembly 2 and the first ethylene glycol nozzle assembly 3 are respectively composed of four nozzles which are uniformly arrayed in the axial direction of the slurry distribution tank 4 and fixedly installed on the inner wall of the slurry distribution tank 4 at corresponding positions, the nozzles of the second ethylene glycol nozzle assembly 2 and the first ethylene glycol nozzle assembly 3 are controlled by plunger valves connected to EG pipelines, and EG can be fed into the slurry distribution tank 4 through the second ethylene glycol nozzle assembly 2 and the first ethylene glycol nozzle assembly 3 when the agitator 8 fails.
Referring to the attached drawings 1, 2 and 3, the four nozzle spraying directions of the corresponding positions of the second ethylene glycol nozzle assembly 2 and the first ethylene glycol nozzle assembly 3 are clockwise and obliquely upward, the nozzle direction of the nitrogen bubbling point 1 is vertically upward, and when the nitrogen bubbling point 1, the second ethylene glycol nozzle assembly 2 and the first ethylene glycol nozzle assembly 3 are started, the slurry in the slurry preparation tank 4 forms a slurry flow which is clockwise, upward rolls all around and downward rolls in the middle.
Referring to the attached drawings 4, 5 and 6, the stirrer 8 comprises a stirring shaft 81 in power connection with the reduction gearbox 7, a dislocation plate 83 is arranged on the stirring shaft 81 in a torsional spring rotating manner, a dislocation cavity 86 is arranged in the dislocation plate 83, a fixed disc 87 positioned in the dislocation cavity 86 is fixedly arranged on the stirring shaft 81, four hinged cavities 85 communicated with the outside are arranged on the dislocation plate 83 in an annular array manner relative to the stirring shaft 81, a fixed pin 89 is fixedly arranged between the inner walls of two sides of the hinged cavity 85 in the clockwise and counterclockwise directions, a reel 84 is arranged on the fixed pin 89 in a torsional spring rotating manner, the torsional spring elasticity between the reel 84 and the fixed pin 89 is far smaller than that between the stirring shaft 81 and the dislocation plate 83, a blade 82 in rotating connection with the fixed pin 89 at the corresponding position is fixedly arranged on the end face of the counterclockwise side of the reel 84, an unfolding rope 88 is wound on the reel 84, the four unfolding ropes 88 respectively extend into the dislocation cavity 86 and are fixedly connected with the excircle end face of the corresponding position of the fixed disc 87, when the stirrer 8 is normally stirred, the four blades 82 are driven by the resistance of slurry to drive the dislocation plate 83 and the stirring shaft 81 to move relatively, the torsion springs between the stirring shaft 81 and the dislocation plate 83 accumulate elastic potential energy, the relative positions of the fixed disc 87 and the four wire wheels 84 are changed, the unfolding ropes 88 pull the wire wheels 84 and the blades 82 at the corresponding positions to rotate, the torsion springs between the wire wheels 84 and the fixed pin 89 accumulate the elastic potential energy, the four blades 82 swing to one side far away from the reduction box 7 to realize a larger stirring range, when the stirrer 8 is in failure, the stirring shaft 81 stops rotating, the dislocation plate 83 resets under the action of the elasticity of the torsion springs between the dislocation plate 83 and the stirring shaft 81, and the blades 82 reset under the action of the elasticity of the torsion springs between the fixed pin 89 and the wire wheels 84, at this time, the blocking area of the blade 82 to the bubbles generated at the nitrogen bubbling point 1 is reduced, which is beneficial to reducing the adhesion of the nitrogen bubbles to the blade 82 and improving the auxiliary stirring effect.
Referring to fig. 7, four centrifugal holes 90 opened to a side far from the stirring shaft 81 are provided at corresponding positions of four spreading ropes 88 on the outer circumferential end surface of the fixed disk 87, a centrifugal ball 93 is slidably provided in the centrifugal hole 90, a centrifugal spring 91 is fixedly provided between an end surface of the centrifugal ball 93 close to one side of the stirring shaft 81 and an inner wall of the centrifugal hole 90 close to one side of the stirring shaft 81, an auxiliary rope 92 is fixedly provided on an end surface of the centrifugal ball 93 close to one side of the stirring shaft 81, the other end of the auxiliary rope 92 extends into the offset cavity 86 and is fixedly connected with the spreading ropes 88 at corresponding positions, when the stirring shaft 81 rotates to drive the fixed disk 87 to rotate, the centrifugal ball 93 slides to a side far from the stirring shaft 81 under the action of centrifugal force, the centrifugal spring 91 is stretched, the auxiliary rope 92 is tensioned and pulls the spreading ropes 88, and the spreading ropes 88 are pulled to drive the blades 82 to rotate to adjust positions, therefore, the blades 82 are normally unfolded under the condition that the slurry resistance is too small and the dislocation plate 83 and the stirring shaft 81 are not dislocated, and the stability of the device is improved.
Referring to the attached drawings 1 and 8, the invention secondly discloses a process for replacing a reduction gearbox of a slurry stirrer without stopping, which comprises the following steps:
stopping PTA blanking immediately after a stirrer 8 fails, and quickly opening a nitrogen bubbling point 1 at the bottom in a slurry configuration tank 4 to convey nitrogen into the slurry configuration tank 4;
secondly, reducing the amount of the slurry fed to the tank by the slurry conveying pump 9 and adjusting the amount of the slurry flowing back to the slurry preparation tank 4 to the maximum limit at the same time of the step one;
thirdly, the slurry preparation EG is switched to a second ethylene glycol nozzle combination 2 and a first ethylene glycol nozzle combination 3, and a rolling slurry flow is formed inside a slurry preparation tank 4;
fourthly, gradually recovering the blanking of the PTA, and carrying out low-load slurry configuration work;
fifthly, overhauling and replacing the stirrer 8, the reduction gearbox 7 and the motor 6;
referring to fig. 1, when the agitator 8 in the slurry preparation tank 4 is working normally, the plunger valves of the nitrogen bubbling point 1, the second ethylene glycol nozzle assembly 2 and the first ethylene glycol nozzle assembly 3 are all in a closed state.
Referring to attached drawings 1 and 8, when low-load slurry configuration is performed, real-time concentration detection is performed on output slurry, and the blanking speed of PTA is adjusted in real time to ensure that the ratio of the slurry is accurate.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (5)
1. The utility model provides a device of change thick liquids agitator reducing gear box does not shut down, includes thick liquids configuration jar (4) from taking agitator (8), its characterized in that: the slurry preparation tank (4) is externally connected with a slurry delivery pump (9) with a return pipeline, a nitrogen bubbling point (1) is arranged at the center of the bottom wall inside the slurry preparation tank (4), a first glycol nozzle combination (3) is arranged on the inner wall of the upper quarter position inside the slurry preparation tank (4), a second glycol nozzle combination (2) is arranged on the inner wall of the lower quarter position inside the slurry preparation tank (4), an axial annular array is arranged on the inner side wall inside the slurry preparation tank (4) relative to the slurry preparation tank (4) and eight turbulence baffles (5) are fixedly arranged, a power end of a stirrer (8) in the slurry preparation tank (4) is connected with a reduction gearbox (7), the reduction gearbox (7) is powered by a motor (6), the stirrer (8) comprises a stirring shaft (81) in power connection with the reduction gearbox (7), and a dislocation plate (83) is rotatably arranged on the stirring shaft (81), a dislocation cavity (86) is arranged in the dislocation plate (83), a fixed disc (87) positioned in the dislocation cavity (86) is fixedly arranged on the stirring shaft (81), four hinged cavities (85) which are communicated with the outside are arranged on the dislocation plate (83) in an annular array relative to the stirring shaft (81), a fixed pin (89) is fixedly arranged between the inner walls of the two sides of the hinge cavity (85) along the clockwise direction and the anticlockwise direction, the wire wheel (84) is arranged on the fixing pin (89) in a rotating way through a torsion spring, the elasticity of the torsion spring between the wire wheel (84) and the fixing pin (89) is far less than that between the stirring shaft (81) and the dislocation plate (83), blades (82) which are rotationally connected with the fixing pins (89) at the corresponding positions are fixedly arranged on the end surface of the anticlockwise side of the wire wheel (84), the wire wheel (84) is wound with four unfolding ropes (88), and the four unfolding ropes (88) respectively extend into the dislocation cavity (86) and are fixedly connected with the outer circle end face of the corresponding position of the fixed disc (87).
2. The device for replacing the reduction gearbox of the slurry stirrer without stopping according to claim 1, characterized in that: the nitrogen bubbling point (1) is formed by a nozzle which is fixedly arranged at the center of the bottom inside the slurry configuration tank (4) and is controlled by a plunger valve, and the plunger valve of the nitrogen bubbling point (1) is connected with a nitrogen pipeline.
3. The device for replacing the reduction gearbox of the slurry stirrer without stopping the vehicle according to claim 1, is characterized in that: the second ethylene glycol nozzle combination (2) and the first ethylene glycol nozzle combination (3) are respectively composed of four nozzles which are uniformly arrayed in the axial direction of the slurry configuration tank (4) and fixedly arranged on the inner wall of the corresponding position of the slurry configuration tank (4), and the nozzles of the second ethylene glycol nozzle combination (2) and the first ethylene glycol nozzle combination (3) are controlled by a plunger valve connected with an EG pipeline.
4. The device for replacing the reduction gearbox of the slurry stirrer without stopping the vehicle according to claim 1, is characterized in that: the four nozzles at the corresponding positions of the second ethylene glycol nozzle combination (2) and the first ethylene glycol nozzle combination (3) are in clockwise inclined upward spraying directions, and the nozzle direction of the nitrogen bubbling point (1) is in vertical upward spraying.
5. The device for replacing the reduction gearbox of the slurry stirrer without stopping the vehicle according to claim 1, is characterized in that: fixed disk (87) excircle terminal surface is gone up and is equipped with the opening to keeping away from four centrifugal holes (90) of (mixing) shaft (81) one side about four expansion rope (88) corresponding positions, it is equipped with centrifugal ball (93) to slide in centrifugal hole (90), centrifugal ball (93) are close to (mixing) shaft (81) one side terminal surface and centrifugal hole (90) and are close to fixed centrifugal spring (91) that is equipped with between (mixing) shaft (81) one side inner wall, centrifugal ball (93) are close to on (mixing) shaft (81) one side terminal surface fixed being equipped with supplementary rope (92), supplementary rope (92) other end extend to in dislocation chamber (86) and with correspond position expansion rope (88) fixed connection.
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| CN202110743315.5A CN113477166B (en) | 2021-06-30 | 2021-06-30 | Device and process for replacing reduction gearbox of slurry stirrer without stopping |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021098071A1 (en) * | 2019-11-22 | 2021-05-27 | 桐昆集团浙江恒通化纤有限公司 | Slurry blending temperature control device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1248777C (en) * | 2003-05-08 | 2006-04-05 | 中国石油化工股份有限公司 | Externally circulating heated reaction or separation container |
| US7608733B2 (en) * | 2004-09-02 | 2009-10-27 | Eastman Chemical Company | Optimized liquid-phase oxidation |
| CN201375882Y (en) * | 2009-03-19 | 2010-01-06 | 咸阳非金属矿研究设计院 | Glass fiber homogenizing device for efficient fluidized bed |
| CN203196559U (en) * | 2013-03-28 | 2013-09-18 | 中国石油化工股份有限公司 | PTA (Purified Terephthalic Acid) slurry agglomeration disperser |
| CN204093298U (en) * | 2014-10-09 | 2015-01-14 | 山东金瑞达环保科技有限公司 | A kind of desulfurizing tower spiral-flow type agitating device based on gypsum lime method |
| CN205973759U (en) * | 2016-08-10 | 2017-02-22 | 新凤鸣集团湖州中石科技有限公司 | Conveyor is prepared to polyester thick liquids |
| CN109364776B (en) * | 2018-10-23 | 2024-09-03 | 常州机电职业技术学院 | Powder liquid mixer |
| CN211098550U (en) * | 2019-07-04 | 2020-07-28 | 南方寝饰科技有限公司 | Slurry tank slurry anti-settling device for spinning external member |
| CN210636047U (en) * | 2019-08-19 | 2020-05-29 | 长沙佳纳锂业科技有限公司 | Stirring-free continuous lithium leaching reaction tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021098071A1 (en) * | 2019-11-22 | 2021-05-27 | 桐昆集团浙江恒通化纤有限公司 | Slurry blending temperature control device and method |
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